National Network of Regional Coastal Monitoring Programmes

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Note that these are real-time data and are not quality-controlled. Long-range graphs are plotted from a randomised subsample of half-hourly data.

Port Isaac

Tide Levels and Harmonics

 


Latest Tide Data (Predicted Tide Table)

Time (GMT)ElevationResidual
09-12-2025 17:203.690.12
 Next HWNext LW
20:43, 6.80 02:59, 1.86
Date Highest 2025 Date Lowest 2025
05-11 8.38m 30-03 -0.05m

Port Isaac Predicted Tide Table (Chart Datum)

09-12-202510-12-202511-12-2025
 Time (GMT)Height Time (GMT)Height Time (GMT)Height
High08:14
20:43
7.28m
6.80m
High09:04
21:34
6.93m
6.43m
High09:58
22:30
6.58m
6.12m
Low02:09
14:44
1.51m
1.56m
Low02:59
15:37
1.86m
1.91m
Low03:51
16:32
2.18m
2.22m
12-12-202513-12-202514-12-2025
 Time (GMT)Height Time (GMT)Height Time (GMT)Height
High10:57
23:31
6.30m
5.92m
High12:00
6.12m
High00:36
13:04
5.87m
6.08m
Low04:48
17:31
2.44m
2.45m
Low05:51
18:34
2.60m
2.54m
Low06:56
19:35
2.61m
2.50m